Product Description
Comprehensive Overview
The Drop-out Fuse and Pull Load Drop-out Fuse stand as the pinnacle of outdoor high-voltage electrical protection, embodying excellence in design and functionality. These expertly engineered devices are strategically placed on the high-voltage side of distribution transformers or serve as indispensable connections within distribution lines. They function as vital protectors against transformer and line short circuits, manage overload scenarios, and facilitate seamless current control for opening and loading operations. The innovative design features an insulating bracket and fuse tubes, with static contacts securely held at each end, while gracefully attached moving contacts adorn the ends of the fuse tube. The fuse tube is equipped with an advanced inner arc tube and a robust outer phenolic paper tube or epoxy glass cloth tube. The Pull Load Drop-out Fuse distinguishes itself with its enhanced versatility, incorporating auxiliary contacts and a meticulously designed arc chute to ensure smooth current load transitions.
In standard operation, the drop-out fuse remains elegantly secured in a closed position, with the fuse tube under exact tension. When system faults are detected, the fault current acts promptly, blowing the fuse and initiating an arc. This vigorous arc ignites the arc tube, decomposing a substantial volume of gas and generating high pressure to create a vertical wind path that skillfully stretches and elongates the arc. As the fuse blows, the moving contact releases, rotating smoothly outwards as the locking mechanism disengages, allowing the fuse tube to drop and attain a decisive breaking position. When load pulling is necessary, an insulating rod is employed to draw out the moving contact while maintaining its connection with the static contact. With continued force application, auxiliary contacts separate, generating an arc that stretches within the hood slit. The arc cover expertly contains the gas, enabling efficient arc extinguishment as the current approaches zero.
Applications and Compliance Standards
This distinguished product is meticulously crafted for use in 10 to 35KV distribution lines, including branching lines and the primary side of distribution transformers. It provides steadfast protection against overloads and short circuits while ensuring efficient separation and combination of the rated load current.
The precision-engineered design of this product complies with the rigorous JB/T8321-1996 Method for AC high-voltage fuse preparation. Its parameters are aligned with the esteemed GB15166.3-1994 standards for high voltage fuses Expulsion fuses. In situations lacking detailed definitions, adjustments are made in accordance with the JB/DQ2139-1986 interim technology requirements for 10 to 35KV outdoor high voltage drop fuses.
The Drop-out Fuse Cutout and Load Switching Fuse Cutout represent the epitome of high-performance outdoor high-voltage protective devices. Precisely designed to connect with the incoming feeder of distribution transformers or lines, they play a crucial role in protecting transformers and lines from short circuit incidents and overload conditions while adeptly handling the on/off load current. The drop-out fuse cutout consists of robust insulating supports and a fuse tube, with static contacts strategically affixed on both sides and moving contacts expertly attached at the ends of the fuse tube. The fuse tube features a sophisticated internal arc-extinguishing tube, complemented by an outer phenolic compound paper tube or epoxy glass tube. The load switching fuse cutout further incorporates high-performance, elastic auxiliary contacts, and an arc-extinguishing enclosure for efficient on-off load current switching.
In typical operational scenarios, the fuse link is engineered to ensure the fuse tube remains tightly closed. Upon encountering faults, the fault current rapidly melts the fuse, generating an electric arc that heats the arc-extinguishing tube, releasing significant volumes of gas to create high pressure and elongate the arc within the tube. Once melted, the moving contact loses tension, permitting the mechanism to lock, and the fuse tube to gracefully drop out, transitioning to an open position. For cutout load switching, operators skillfully use an insulating operating bar to draw the moving contact. Initially, the main contact remains engaged with the auxiliary static contact. As the auxiliary contact is further pulled, an electric arc forms between them, extending within the arc-extinguishing enclosure gap. Simultaneously, the arc-extinguishing mechanism expels gas to proficiently extinguish the arc as the current passes through zero.
Product Parameters
| Typ |
Rated Volatge (kv) |
Rated Current (A) |
Breaking current (kA) |
Impulse voltage (BIL) |
Power-frequency withstand voltage |
Leakage distance (mm) |
Weight (kg) |
| UD-1 |
12 |
100 |
6.3 |
110 |
40 |
250 |
5.8 |
| UD-1 |
12 |
200 |
8 |
110 |
40 |
250 |
5.8 |
| UD-2 |
15 |
100 |
10 |
125 |
45 |
320 |
6.9 |
| UD-2 |
15 |
200 |
12 |
125 |
45 |
320 |
6.9 |
| UD-3 |
24 |
100 |
8 |
150 |
65 |
530 |
10 |
| UD-3 |
24 |
200 |
10 |
150 |
65 |
530 |
10 |
| UD-4 |
15 |
100 |
10 |
125 |
45 |
350 |
4.15 |
| UD-4 |
15 |
200 |
12 |
125 |
45 |
350 |
4.15 |
| UD-5 |
12 |
100 |
6.3 |
110 |
40 |
250 |
6.3 |
| UD-5 |
12 |
200 |
8 |
110 |
40 |
250 |
6.3 |
| UD-6 |
15 |
100 |
10 |
125 |
45 |
320 |
10 |
| UD-6 |
15 |
200 |
12 |
125 |
45 |
320 |
10 |
| UD-7 |
24 |
100 |
8 |
150 |
65 |
540 |
10 |
| UD-7 |
24 |
200 |
10 |
150 |
65 |
540 |
10 |
| UD-7(F) |
33 |
200 |
12 |
170 |
70 |
720 |
4.4 |
| UD-8 |
33 |
100 |
10 |
170 |
70 |
720 |
11.6 |
| UD-8 |
33 |
200 |
12 |
170 |
70 |
720 |
11.6 |
Main product
Company Profile
Zhejiang ChaoTai Complete Equipment Co., Ltd. is a shining exemplar of groundbreaking innovation and unmatched excellence in the vibrant and ever-evolving sphere of electrical integration. As a dynamic high-tech enterprise, we proudly present a team rich in experience for R&D, production, and service, which is fortified by over 15 years of steadfast dedication and expertise in the industry.
Our extensive array of products includes high-voltage solid-state soft starters, advanced capacitor cabinets, comprehensive high and low voltage switchgear, cutting-edge gas-insulated switchgear, and robust substations. These top-tier products are essential across a wide array of industries. They diligently serve the energy and chemical sectors, metal smelting, expansive electrical power grids, industrial manufacturing, as well as distinguished universities and research institutions. Our innovative solutions also energize the medical and pharmaceutical industries, bolster municipal commerce, enhance water conservation and hydropower projects, optimize traffic systems, and elevate both commercial and residential developments.
Rooted in a steadfast commitment to technological advancement and guided by the 'smart manufacturing' philosophy, we are dedicated to attracting elite technical talent to significantly enhance our core competitive edge. Our mission is resolute: to deliver unrivaled value to our clients and to craft the industry's most esteemed brand. Since our inception, we have made relentless progress, journeying from our origins to a pinnacle of excellence. Innovation paves our path, sustained by a modern business ethos where quality is our lifeline, market orientation is paramount, reputation fuels growth, and efficiency is achieved through strategic management. We consistently adhere to the guiding principles of 'technology as the guide, standardized management, superior quality, and customer satisfaction' in our quality and technical talent management. Our diligent efforts are focused on expanding our market presence. Our mission is clear: to serve China's electric power and grid transmission and distribution sectors with increasing speed, strength, and ambition. At the heart of our operations, integrity is non-negotiable, quality is sacred, service is supreme, and customer satisfaction is our enduring creed. Our relentless pursuit of excellence, perpetual innovation, and commitment to building a trustworthy brand are our guiding lights. Your recognition fuels our progress. We extend our deepest gratitude to all our loyal clients for their unwavering support, and Senhang Technology eagerly anticipates partnering with you to craft a brighter future together.
Our Advantages
Certifications
After Sales Service
FAQ
Q1. Are you a factory or trading company?
A.We are a factory.
Q2. Where is your factory located? How can I visit there?
A. Our factory is located in Wenzhou City, Zhejiang Province, China. You can fly to Longwan airport directly. All our clients,from home or abroad, are warmly welcome to visit us!
Q3. What's the payment term?
A. We accept TT. 30% deposit and 70% before shipment, Western Union, L/C At Sight is ok! We'll l show you the photos of the products and packages before you pay the balance.
Q4. Tell me the standard of package? What is your terms of packing?
A: Generally, we pack our goods in neutral white boxes and brown cartons, If vou have leaallyl registered patent, we can pack the goods in your branded boxes after getting your authorization letters.
Q5. Would you accept to use our logo?
A. If you have good quantity,it absolute no problem to do OEM.
Q6. How about the transport?
A. If the number of aoods is small we usually use TNT.DHL.FEDEX.EMS and some express voull offered. If the number of the goods is big usually we use the FWD you offered or we provided. Either by sea or by air is OK.
Q7. What is your Production lead time /delivery time?
A: Generally, it will take 25 to 30 days after receivina vour advance payment.
The specificl delivery time depends on the items and the quantity of your order. Silicone rubber's reqular product is 1,000/ week, Porcelain's need 2-3 weeks about 1000 pcs.
Q8. How do you make our business long-term and good relationship?
A:l. We keep aood auality and competitive price to ensure our customers benefit:
A: 2. We respect every customer as our friend and we sincerely do business and make friendsl with them, no matter where they come from.
A: 3.Most goods we have the type report according the IEC STANDARD
Q9. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the courier cost.
Q10. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
Q11. What is your terms of delivery?
A: EXW, FOB, CFR, CIF.
Q12.What certificates do you have?
A:ISO9001,OHSAS18001,ISO14001 certificate and Type test report of product.
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